/*
 * Copyright (c) 2009. Gridshore
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package nl.gridshore.cqrs.eventhandler;

import nl.gridshore.cqrs.DomainEvent;

import java.util.LinkedList;

/**
 * @author Allard Buijze
 */
public class SimpleEventBus implements EventBus {

    private LinkedList<EventHandler> handlers;

    @Override
    public void unsubscribe(EventHandler eventHandler) {
        handlers.remove(eventHandler);
    }

    @Override
    public void subscribe(EventHandler eventHandler) {
        handlers.add(eventHandler);
    }

    @Override
    public void dispatch(DomainEvent event) {
        for (EventHandler handler : handlers) {
            if (handler.canHandle(event.getClass())) {
                handler.handle(event);
            }
        }
    }
}
